What is a diadem?
By Jared James · Last updated 21 May 2026
Definition
A diadem is a jewelled headband or crown worn around the head as a symbol of royalty, authority or high honour. It is usually a rigid or semi-rigid band, often three-dimensional and set with gemstones, and it sits across the top of the head or around the brow. The word comes from the Greek diadema, meaning a band tied around the head, and the original form was simply a white ribbon worn by Hellenistic kings. Today it is mostly used to describe royal or ceremonial headpieces, and is sometimes used interchangeably with tiara.
Frequently asked questions
- What is the difference between a diadem and a tiara?
- The terms overlap considerably. A tiara is typically a semi-circular ornament worn towards the front of the head and is associated with formal occasions and bridal wear, while a diadem can be a full band or crown and tends to carry stronger royal or ceremonial associations.
- Who wears a diadem?
- Historically, monarchs, rulers and high priests wore diadems as symbols of their authority. Today royal families still wear them on formal occasions, and they appear in bridal and couture contexts too.
- What is a diadem made of?
- Royal diadems are typically made in gold or silver set with diamonds, pearls and coloured gemstones. Contemporary versions range from fine jewellery to more affordable pieces in crystal and gilded metal.
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